honestly, there are no official research about this way of baby making but the fact that this is commonly accepted like missionary position which is one of the best among positions for conceiving. so, i guess it works but it doesn't work on all of the couples out there.

well there are so many things to keep in mind, to avoid, to do, and all that. just like the belief that it is effective when you are lying with your hips raised on a pillow upwards or having our legs in the air for about 20-30 minutes after having sex.